Question

A satellite orbiting Earth at an orbital radius r has a velocity v. Which represents the velocity if the satellite is moved to an orbital radius of 3r?(1 point) Responses 3v 3 v 3–√v square root of 3 v 13v 1 third v 13√v

Answer 1

For which project would knowledge of Kepler's laws prove most useful?(1 point) Responses calculating the mass of Earth calculating the mass of Earth measuring the distance between Earth and the moon measuring the distance between Earth and the moon putting a communications satellite in Earth orbit putting a communications satellite in Earth orbit determining the structure of the solar system's planets

Answer 2

A satellite is orbiting Earth at an orbital radius of 7.3×104 m. What is its velocity in terms of G and the mass of Earth, mp ? (Ignore units in the answer.)(1 point) Responses (2.7×102)Gmp−−−−√ open paren 2 point 7 times 10 squared close paren times square root of cap g m sub p end root (3.7×10−3)Gmp−−−−√ open paren 3 point 7 times 10 to the negative 3 power close paren times square root of cap g m sub p end root (7.3×104)Gmp−−−−√ open paren 7 point 3 times 10 to the 4th power close paren times square root of cap g m sub p end root (1.4×10−5)Gmp−−−−√

Answer 3

In 3–5 sentences, explain how the shape of planetary orbits affects their orbital velocity. Include the proper law of planetary motion as part of your answer.(4 points)

Answer 4

In 3-5 sentences, describe how Copernicus developed his model of the solar system. In your answer, include an explanation for why his model was, or was not, readily accepted at the time.

Answer 5

The gravitational force between two objects is 360 Newtons. The objects move such that their distance is now three times their original distance. What is the new gravitational force between the objects?(1 point)

Answer 6

In 3-5 sentences, analyze why Aristotle's and Ptolemy's models were accepted for more than a thousand years in spite of being completely incorrect. In your answer, use the term geocentric.